CN1272533C - Exhaust-gas purifying apparatus - Google Patents
Exhaust-gas purifying apparatus Download PDFInfo
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- CN1272533C CN1272533C CNB2003101043542A CN200310104354A CN1272533C CN 1272533 C CN1272533 C CN 1272533C CN B2003101043542 A CNB2003101043542 A CN B2003101043542A CN 200310104354 A CN200310104354 A CN 200310104354A CN 1272533 C CN1272533 C CN 1272533C
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- Prior art keywords
- outlet pipe
- carrier
- catalytic converter
- carrier element
- cylindrical shape
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/92—Chemical or biological purification of waste gases of engine exhaust gases
- B01D53/94—Chemical or biological purification of waste gases of engine exhaust gases by catalytic processes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/88—Handling or mounting catalysts
- B01D53/885—Devices in general for catalytic purification of waste gases
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
- F01N13/009—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00 having two or more separate purifying devices arranged in series
- F01N13/0097—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00 having two or more separate purifying devices arranged in series the purifying devices are arranged in a single housing
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
- F01N13/011—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00 having two or more purifying devices arranged in parallel
- F01N13/017—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00 having two or more purifying devices arranged in parallel the purifying devices are arranged in a single housing
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
- F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
- F01N3/28—Construction of catalytic reactors
- F01N3/2803—Construction of catalytic reactors characterised by structure, by material or by manufacturing of catalyst support
- F01N3/2807—Metal other than sintered metal
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
- F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
- F01N3/28—Construction of catalytic reactors
- F01N3/2839—Arrangements for mounting catalyst support in housing, e.g. with means for compensating thermal expansion or vibration
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
- F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
- F01N3/28—Construction of catalytic reactors
- F01N3/2839—Arrangements for mounting catalyst support in housing, e.g. with means for compensating thermal expansion or vibration
- F01N3/2842—Arrangements for mounting catalyst support in housing, e.g. with means for compensating thermal expansion or vibration specially adapted for monolithic supports, e.g. of honeycomb type
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Combustion & Propulsion (AREA)
- General Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Mechanical Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Toxicology (AREA)
- Biomedical Technology (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
- Exhaust Gas After Treatment (AREA)
- Catalysts (AREA)
Abstract
An exhaust-gas purifying apparatus includes a mantle, a support, and a catalytic layer. The support is disposed in the mantle, and is formed as at least one shape selected from the group consisting of cylinder shapes and corrugated shapes. The catalytic layer is loaded on at least one of the surfaces of the support. Moreover, the support includes at least two support elements disposed in the axial direction of the mantle, and the two support elements neighboring in the axial direction of the mantle are disposed out of phase with each other in the peripheral direction of the mantle. The exhaust-gas purifying apparatus shows not only an enhanced exhaust-gas purifying ability but also high misfire resistance.
Description
Technical field
The present invention relates to a kind of catalytic converter that is used for automobile or motorcycle.
Background technique
In order to purify, can use catalytic converter from the waste gas of automobile and motorcycle discharge.Catalytic converter has many kinds, as thermal reactor system, stingy combustion system, EM Engine Modification system and antigravity system.Wherein the catalytic converter of antigravity system once was widely used.
The precious metal of the catalytic converter use catalysis of antigravity system such as Pt (platinum), Rh (rhodium) and Pd (palladium) come purifying exhaust air.Catalyzer is made in the following manner.On catalyst carrier, form a catalytic layer with activated alumina such as gamma-alumina.Precious metal with one or more catalysis loads thereon then.
Heat-resistant material is used to make catalyst carrier, because catalyst carrier will be exposed under the waste gas of high temperature.As this material can one carry for pottery as steinheilite (cordierite), heating resisting metal such as stainless steel.
The catalyst carrier of being made by pottery has such shortcoming: they are subject to the influence of mechanical shock and present big exhaust resistance.Therefore under the reason that the pressure loss of vent systems should be reduced or the temperature capacity of catalyst carrier should be enhanced, be used by the catalyst carrier of metal manufacturing.
The catalytic converter that is provided with metallic catalyst carrier for example can be made in the following manner.The steel billet material is rolled into the workpiece of paper tinsel shape or sheet.The steel billet material can be SUS304 (by Japanese industrial standard JIS, i.e. 18Cr-8Ni Austenitic Stainless Steel) or SUS430 (pressing JIS, i.e. the 16Cr Ferritic Stainless Steel).The catalyst carrier that paper tinsel shape that causes or sheet-like workpiece are processed to metal.On the metallic catalyst carrier that causes, make a catalytic layer then.At last, one or more catalytic precious metals are carried on the catalytic layer.Like this, the catalytic converter that is provided with metallic catalyst carrier is just accused and is finished.
The shape that depends on catalyst carrier, catalytic converter can be divided into integrated type, grain, cellular formula and tubular type.
The problem that exists in cellular catalytic converter is that the misfire that metallic catalyst carrier may transmit owing to internal combustion engines is melted.Specifically, when catalyst carrier was melted, effective heap(ed) capacity of catalytic precious metal can be reduced, and perhaps cellular chamber can blocked so that reduction waste-gas cleaning ability.
In addition, in the tubulose catalytic converter, axial length should be able to extend as a means of obtaining suitable waste-gas cleaning ability.Therefore may involve the scalability problem of tubulose catalytic converter.In addition, when the axial length of tubulose catalytic converter was extended, exhaust gas temperature may be landed so that the waste-gas cleaning ability is lowered.
Therefore, the tubulose catalytic converter once developed to the direction that shortens its axial length.Japanese laid-open patent communique (KOKAI) 9-228 for example, 832 and 9-317, No. 452 this tubulose catalytic converter was just proposed once.
Japanese laid-open patent communique (KOKAI) 9-228 once disclosed a kind of catalyst changer No. 832, wherein was fitted in the outlet pipe by the corrugated metal sheet metallic carrier of making of reeling.
Japanese laid-open patent communique (KOKAI) 9-317 once disclosed a kind of catalytic converter No. 452, and wherein a plurality of narrow tubes are set in the large diameter tube.
But disclosed catalyst changer and catalytic converter all have such problem in above-mentioned communique, and promptly waste gas does not all have to contact fully with narrow tube with metallic carrier when flowing through outlet pipe with large diameter tube.Specifically, its waste-gas cleaning ability is inadequate.More accurate point says, because metallic carrier and narrow tube be all along the flow direction setting of waste gas, waste gas is in flowing through outlet pipe and large diameter tube the time, less be carried in metallic carrier and contact with catalyzer on the narrow tube.
Summary of the invention
The present invention develops in view of above-mentioned situation.Therefore the objective of the invention is to provide a kind of catalytic converter with high purifying ability.
The present inventor once studied catalytic converter repeatedly, made it can have large size to contact with waste gas.Found that when on the flow direction that carrier is arranged on waste gas by the multistage mode, above-mentioned purpose can reach, they have just finished the present invention like this.
The invention provides a kind of catalytic converter that is used for automobile or motorcycle, comprising: an outlet pipe; A metallic carrier that is located in the outlet pipe, and be made into the shape that at least one is chosen from the cohort that is made of cylindrical shape and waveform; And be loaded at least one lip-deep catalytic layer of metallic carrier; Wherein, metallic carrier have at least two metal carrier members be located at outlet pipe axially on, and two be set to not on same phase place on the peripheral direction of adjacent metal carrier element at outlet pipe on axially at outlet pipe.
In this catalytic converter, carrier comprise at least two carrier elements be arranged on outlet pipe axially on, and two outlet pipe on axially on the adjacent peripheral direction of carrier element at outlet pipe but not on same phase place.Therefore the waste gas that flows through in the outlet pipe contacts with the surface of carrier element easily.Specifically, the carrier element that is located at the waste gas upstream side disturbs flowing of waste gas, and disturbed mobile waste gas contacts with the carrier element that is located at exhaust gas downstream side.As a result, this catalytic converter can show high waste-gas cleaning ability.
In addition, when the thickness of the carrier of making cylindrical shape or waveform is thickeied, can improve the resistance of this catalytic converter to misfire.Note better be the THICKNESS CONTROL that will make cylindrical shape or waveform be 0.3mm or more than, be more preferably and be controlled at 0.3 in the scope of 1.0mm.
Description of drawings
After reading the detailed description of doing below in conjunction with accompanying drawing, work as and to the present invention and many advantages thereof more complete understanding to be arranged.
In the accompanying drawings:
Fig. 1 and 2 is respectively the layout plan of the catalytic converter of example 1 of the present invention and 2;
Fig. 3 and 4 is respectively the layout plan of the catalytic converter of reference example 1 of the present invention and 2;
Fig. 5 be a comparison diagram illustrate respectively example 1 and 2, reference example 1 and 2, and the catalytic converter of comparative example 1 and 2 on carry out the waste-gas cleaning test the result;
Fig. 6 and 7 is respectively the catalytic converter of example 4 and comparative example 3 at the image that stands to draw after the misfire resistance test;
Fig. 8,9 and 10 is respectively the layout plan of the catalytic converter of example 3,4 of the present invention and 5.
Embodiment
Understand the present invention above in general, will describe further combined with concrete preferred embodiment below, but these embodiments just are used for explanation, can not be used for limiting appended claims institute restricted portion.
This catalytic converter comprises an outlet pipe, a carrier and a catalytic layer.Carrier is located in the outlet pipe, and at least one shape of choosing in the cohort that is made into to be made of cylindrical shape and waveform.Catalytic layer is loaded at least one surface in the carrier.In this catalytic converter, the catalytic layer reverse purge flow is by the waste gas in the outlet pipe.
In this catalytic converter, carrier comprise at least two carrier elements be located at outlet pipe axially on.These two outlet pipe on axially on the adjacent peripheral directions of carrier element at outlet pipe but not on same phase place.
When carrier comprises at least two when being located at the carrier element of outlet pipe on axially, the useful load of catalytic layer just can increase.Therefore, with regard to the purifying ability of waste gas, this catalytic converter is improved.
Two outlet pipe on axially on the adjacent peripheral directions of carrier element at outlet pipe but not on same phase place.Notice that " two carrier elements are not on same phase place " meaning is meant the vertical section with respect to the axial cutting perpendicularly of outlet pipe that each carrier element is had nothing in common with each other, and in carrier element, the shape of these relative sections may be internally inconsistent.Specifically, when a plurality of carrier elements have identical relative section mutually, have at least two carrier elements to be provided with like this, make in them one as going to the opposite around the outlet pipe rotational, perhaps one of them with respect to another as being that upside forwards downside to by reversing.Therefore, the carrier element that is located at the waste gas upstream side can disturb flowing of waste gas, and disturbed exhaust flow can contact with the carrier element that is located at exhaust gas downstream side.As a result, the catalyzer that is used for waste-gas cleaning of the present invention just can show high waste-gas cleaning ability.
Carrier preferably can comprise three or more carrier elements, and this three or more carrier element preferably can be set on the mutually different phase place on the peripheral direction of outlet pipe.When a plurality of carrier elements were provided with like this, this catalytic converter can show especially high waste-gas cleaning ability.
When carrier comprised a plurality of carrier element, the distance between the adjacent carrier element there is no concrete restriction.Specifically, carrier element can be set up by predetermined interval, perhaps can also contact with each other with its axial end surface.
When carrier element is provided with by predetermined interval, be located at flowing that the carrier element of waste gas upstream side can big large disturbance waste gas, and this disturbed greatly exhaust flow can contact with the carrier element that is located at exhaust gas downstream side.In addition, when carrier element was provided with contacting with each other, the heat energy of upstream side carrier element was conducted to the downstream side carrier element, so that whole carrier can be heated rapidly.Therefore, this catalytic converter also is improved with regard to the waste-gas cleaning ability that has immediately after internal-combustion engine starts.
In this catalytic converter, catalytic layer is loaded at least one surface in the carrier.Like this, as long as catalytic layer can be loaded at least one surface in the carrier, just can obtain the waste-gas cleaning ability of this catalytic converter.Attention as long as catalytic layer is loaded on the surface in the carrier, purifies and requires just can be met in this catalytic converter.In addition, except the surface of carrier, catalytic layer also can be loaded on the interior perimeter surface of outlet pipe.
Carrier element can be made by corrugated sheet preferably, and having a shape in its cross section at least is to choose from the cohort that is made of letter " S " and letter " U ".When carrier element was made by this corrugated sheet, carrier just can obtain big surface area.Therefore catalytic layer can be loaded on the big surface area.Thereby this catalytic converter can show a very high waste-gas cleaning ability.
The shape of noting letter " S " is meant that when axially cutting perpendicular to outlet pipe, its shape of cross section has the summit of upper process in the opposite direction, and this shape also comprises the shape of letter " Z ".In addition, the shape of letter " U " is meant the shape of cross section that contacts with the interior perimeter surface of outlet pipe on bottom and top, can not be restricted to the just shape of letter " U " to it.For example letter " U " shape can comprise letter " V " shape and letter " W " shape.
The corrugated sheet that carrier element can be preferably has an alphabetical serpentine cross section by polylith is made.When carrier element is made by this corrugated sheet of polylith, just can provide big surface area to carrier.Therefore catalytic layer can be loaded on the big surface area.Thereby this catalytic converter can show very high waste-gas cleaning ability.Notice that the corrugated sheet with alphabetical S shape cross section refers to have a plurality of troughs and crest on the cross section of corrugated sheet.
Each carrier element can both have a carrier element assembly parts that comprises a plurality of cylindrical shape carrier elements preferably, and have at least two outlet pipe axially on adjacent cylindrical shape carrier element can in each carrier element assembly parts, contact with each other preferably with its outer surface.So just, can provide a big surface area to carrier.Therefore catalytic layer can be loaded on the big surface area.Thereby this catalytic converter can show a very high waste-gas cleaning ability.
In each carrier element assembly parts, have at least a cylindrical shape carrier element can have an annular cross section and a cut-off preferably, and this annular cross section can be arranged in the outlet pipe preferably with the elastic deformation that can on centrifugal direction, expand.Adopt such layout, in a cylindrical shape carrier element, have a power effect at least, make by axially cutting the annular cross section that forms and to expand on the centrifugal direction in outlet pipe perpendicular to the cylindrical shape carrier element.Compel on the outer surface of another adjacent cylinders shape carrier element and/or on the interior perimeter surface of outlet pipe from defeating of cylindrical shape carrier element.Another oppressed like this cylindrical shape carrier element also can further be oppressed adjacent cylindrical shape carrier element.The compressing operation will be carried out continuously, thereby a plurality of cylindrical shape carrier element can be fixed in the outlet pipe with locating.
In addition, in this catalytic converter, when a pair of opening end that on annular cross section, forms cut-off near each other, perhaps axial when cavity in one of them opening end stretches to the cylindrical shape carrier element, one of them cylindrical shape carrier element can easily be set at this elastic deformation it can be expanded on centrifugal direction, because as long as simply the cylindrical shape carrier element of such distortion is fitted in the outlet pipe.
At least therein in cylindrical shape carrier element, annular cross section has a cut-off, shows that this cylindrical shape carrier element is made into an annular of cutting to small part at the vertical cross section that cuts perpendicular to axial direction.This part is cut and can be obtained satisfied effect.With regard to cut-off being provided with regard to the phase place on the circumferencial direction of cylindrical shape carrier element, and unrestricted.Specifically, cut-off can be made into the straight line with the axioversion of cylindrical shape vehicle group component, perhaps can be made into curve.
In addition, one of them cylindrical shape carrier element, its vertical cross-section that cuts perpendicular to axial direction is not cut open but an annular.It just is a complete annular that the annular cross section of noting the cylindrical shape carrier element is not limited to, but can be made into ellipse or even become rectangular and triangle.
At least therein in cylindrical shape carrier element, cut-off is preferably continuous, extends to the other end from an axial end of cylindrical shape carrier element.When cut-off is a consecutive hours, the cylindrical shape carrier element more easily expands on centrifugal direction.
Carrier element can be made into cylindrical shape preferably, can contact with each other with its outer surface preferably, and can interlink on the outer surface of contact preferably.In addition, when a plurality of carrier elements interlinked on the outer surface of contact, they just can not do the displacement of location mutually, and can not throw off from adjacent carrier element.The result just can stop the interior perimeter surface that is loaded in carrier element and at least one the lip-deep catalytic layer sustain damage in the outer surface, thereby can stop the waste-gas cleaning ability of catalytic layer to degenerate.
Carrier element can contact and be bonded on it with the interior perimeter surface of outlet pipe preferably.Adopt this to arrange, carrier element just can not be done the displacement of location in outlet pipe, and can not come off from outlet pipe.
Outlet pipe and/or carrier element can be made of metal preferably.When doing like this, the just easy and carrier element binding of outlet pipe.In addition, when outlet pipe and carrier element were made by metal, this catalytic converter was easily by waste heating, thereby the catalytic capability of catalytic layer can immediately play a role after internal-combustion engine is started.The metallic material of making outlet pipe and carrier element there is no concrete restriction.Therefore can use known traditionally metallic material.
Carrier element can be made by the stephanoporate steel plate with a plurality of through holes preferably.Many holes are just arranged on the carrier element when doing like this.When exhaust-gas flow was passed through these holes, waste gas will contact with catalytic layer easilier, thereby the waste-gas cleaning ability of this catalytic converter can be enhanced.
Outlet pipe can be an outlet pipe preferably, like this as long as waste gas is passed through in outlet pipe, and just can purifying exhaust air.
This catalytic converter can use known traditionally catalytic layer.Catalytic layer can comprise the catalyst component that is loaded on the catalytic layer preferably.
The effect of catalytic layer is to enlarge the catalyzer of purifying exhaust air and the area of contact of waste gas.In this catalytic converter, can use heat-resisting inorganic oxide as catalytic layer, this material once was used as common exhaust gas purifying catalyst in the past.For example catalytic layer can have heat-resisting inorganic oxide preferably, and its main component is the aluminium oxide of activation.In addition, catalytic layer also can contain cerium oxide and/or zirconium oxide preferably.When catalytic layer contained these oxides, this catalytic converter was with regard to the feature of waste-gas cleaning, and grade just can improve.In addition, the thickness of catalytic layer there is no concrete restriction, but can suitably be controlled according to the purposes of this catalytic converter.
Catalyst component is loaded on the catalytic layer.This loading can be finished after catalytic layer is made, perhaps can be included in the catalytic layer and make simultaneously with catalytic layer, catalyst component is mixed together with the thin pulp that is made of activated alumina at that time, then the mixed stock that causes is coated at least one surface in the carrier.In the catalyzer of purifying exhaust air, catalyst component is the composition of energy purifying exhaust air.Therefore can use the catalyst component that once was used in the common purifying exhaust air catalyzer.For example can use any in oxidation catalyst, reducing catalyst and the three usefulness catalyzer.
Specifically, when being used as catalyst component at least one that from the cohort that constitutes by platinum (Pt), palladium (Pd) and rhodium (Rh), chooses, just can remove carbon monoxide (CO), hydrocarbon (HC) and nitrogen oxide (NOx) effectively.In addition, the catalyst component useful load there is no concrete restriction, but can suitably be controlled according to the purposes of this catalytic converter.
Example
Following the present invention will illustrate that the manufacturing of the tubulose catalytic converter that the present invention uses also will illustrate below in more detail in conjunction with object lesson.
Example 1
Produce cross section perpendicular to axial direction cylindrical shape carrier 20 at first in the following manner for letter " C " shape.Be ready to a pipe, the outer diameter of this pipe is that 19mm, length are that 90mm, thickness are 0.6mm, is made of SUS304 steel (pressing JIS).This pipe is cut on a part of perisporium vertically continuously, thereby forms an opening 201.The Zhou Biankuan that notes this opening 201 is 2mm.Zhou Biankuan can be preferably pipe or cylindrical shape carrier 20 whole peripheral length 1/100 to 10/100, be more preferably from 1/100 to 5/100.
Be ready to the cylindrical shape carrier 30 as one kind, 30 of two cross sections perpendicular to axial direction for annular then, cylindrical shape carrier 30 as one kind, 30 outer diameter are that 19mm, length are that 90mm, thickness are 0.6mm, are made of SUS304 steel (pressing JIS).In addition, prepare an outlet pipe 40, the outer diameter of this outlet pipe 40 is that 42.7mm, length are that 90mm, thickness are 1.2mm, is made of SUS304 steel (pressing JIS).With cross section perpendicular to axial direction is that the cylindrical shape carrier 20 of letter C shape and cross section perpendicular to axial direction together are fitted in the outlet pipe 40 for annular two cylindrical shape carrier 30 as one kind, 30.They are set at the middle part in the axial direction of outlet pipe 40.
In addition, be ready to two groups of cylindrical shape carriers 20,30,30 identical with top situation, every group has three carriers, one of them carrier 20 has the vertical cross-section of C shape, two other carrier 30 as one kind, 30 has the vertical cross-section of annular, then these two groups each three carriers is fitted in the outlet pipe 40 from two opposing open end of outlet pipe 40 respectively.When three groups of cylindrical shape carriers 20,30,30 all were fitted in the outlet pipe 40, they were set to not on same phase place, and perhaps their phase places of being set up in outlet pipe 40 are consistent mutually.In other words, these three groups of cylindrical shape carriers 20,30,30 outlet pipe 40 axially on be configured to irregular mode.In addition, be arranged in the outlet pipe 40 cylindrical shape carrier 20,30,30 on the axial diverse locations all with its axial end and an adjacent set of contact.
Subsequently, the contacting part between three cylindrical shape carriers 20,30,30 and outlet pipe 40 gives brazing with nickeliferous brazing alloy.Because brazing, three cylindrical shape carriers 20,30,30 and outlet pipe 40 are attached at together.
At that time, by composite oxides, binding agent, Pt, Rh and the water of mixed activated alumina, Ce-Zr prepare thin pulp equably.Activated alumina is γ-Al
2O
3, consumption is that the consumption of 57.6 parts of Ce-Zr composite oxides is 32.4 parts.Notice that these Ce-Zr composite oxides are converting CeO to
2The time its consumption may be 27.5 parts.The consumption that links agent is 5.8 parts.The consumption of Pt is 3.6 parts.The consumption of Rh is 0.7 part.The consumption of water is 250 parts.More than these consumptions all by weight.
The thin pulp that causes is applied on the interior perimeter surface of outlet pipe 40 and on the outer surface and interior perimeter surface of cylindrical shape carrier 20,30,30.The attention coated weight is 90g/m
2After this, the thin pulp of coating was calcined one hour at 500 ℃.
Can make example 1 desired tubulose catalytic converter 10 according to said procedure, it is arranged as shown in Figure 1.Notice that outlet pipe 40 is shown in broken lines, in order that cylindrical shape carrier 20,30,30 layout in the tubulose catalytic converter 10 in example 1 is watched easily in the drawings.
Example 2
Being arranged on them in the outlet pipe 41 except using perforated tube to prepare nine cylindrical shape carriers 21,31,31, the manufacturing and the example 1 of the tubulose catalytic converter 11 of example 2 are identical.
Specifically, in the tubulose catalytic converter 11 according to example 2, nine the cylindrical shape carriers 21,31,31 that are fixed in the outlet pipe 41 all are to be made by the steel pipe of porous.Three cylindrical shape carriers 21,31,31 of each group all are arranged in the outlet pipe 41 with same axial position, have only that cylindrical shape carrier 21 is provided with letter C shape with axial vertical cross section.
Fig. 2 illustrates the layout according to the tubulose catalytic converter 11 of example 2.Notice that outlet pipe 41 is shown in broken lines, in order that cylindrical shape carrier 21,31,31 being provided with easily in the tubulose catalytic converter of example 2 watched in the drawings.
When making tubulose catalytic converter 10 and 11 according to example 1 and 2, the cylindrical shape carrier can easily be fitted in the outlet pipe.
Specifically, in the time will being fitted into cylindrical shape carrier 20,30,30 or 21,31,31 in outlet pipe 40 or 41, the opening 201 or 211 of cylindrical shape carrier 20 or 21 can be dwindled.Because cylindrical shape carrier 20 or 21 dwindling on diameter with C shape vertical cross-section, cylindrical shape carrier 20,30,30 or 21,31,31 just can easily be fitted into and be positioned at outlet pipe 40 or 41, and after being equipped with and locating like this, resiliently deformable can produce a power on centrifugal direction expand cylindrical shape carrier 20 or 21.Therefore, because press drum shape carrier 20 just contact with the interior perimeter surface of outlet pipe 40 or 41 with 21, and owing to pressure also contacts with the cylindrical shape carrier 30 as one kind with annular cross section perpendicular to axial direction, 30 or 31,31 outer surface.And these two cylindrical shape carrier 30 as one kind, 30 or 31,31 are because the power that apply of cylindrical shape carrier 20 or 21 also contact with the interior perimeter surface of outlet pipe 40 or 41 with pressure, and pressure contacts with adjacent cylindrical shape carrier 20,30 or 21,31 outer surface.
In addition, when the cylindrical shape carrier being equipped with and being set in the outlet pipe, the cylindrical shape carrier can be fixed on self on the outlet pipe.Therefore when carrying out braze operation, do not need the cylindrical shape carrier to be fixed on the outlet pipe temporarily.Thereby when making tubulose catalytic converter 10 and 11, can reduce expense sharp according to example 1 and 2.
Comparative example 1
This routine catalytic converter is made in the following manner.Prepare a pipe, its outer diameter is that 42.7mm, length are that 90mm, thickness are 1.2mm, is made of SUS304 steel (pressing JIS).This pipe is provided with catalytic layer in the mode identical with example 1 on interior perimeter surface.
Comparative example 2
This example is made in the following manner.Prepare a perforated tube, its outer diameter is that 28.6mm, length are that 90mm, thickness are 1mm, is made of SUS304 steel (pressing JIS).Perforated tube is provided with catalytic layer in the mode identical with example 1 on its whole internal and external circumferential surface.Notice that it is that 42.7mm, thickness are in the outlet pipe of 1.2mm that perforated tube is fixed on an outer diameter coaxially in this example.
Reference example 1
Make a cylindrical shape carrier at first in the following manner, its cross section perpendicular to axial direction is made into C shape.Be ready to a pipe, its outer diameter is that 19mm, length are that 90mm, thickness are 0.6mm, is made of SUS304 steel (pressing JIS).This pipe is cut on the part of perisporium continuously vertically, thereby forms a cut-off 221, notices that cut-off 221 has the peripheral length (spacing) of a 2mm.
Prepare two cylindrical shape carriers 32,32 then, its cross section perpendicular to axial direction is made into annular.The outer diameter of this cylindrical shape carrier 32,32 is that 19mm, length are that 90mm, thickness are 0.6mm, is made of SUS304 steel (pressing JIS).In addition, prepare an outlet pipe 42, its outer diameter is that 42.7mm, length are that 90mm, thickness are 1.2mm, is made of SUS304 steel (pressing JIS).Then these three cylindrical shape carriers (wherein label 22 has C shape cross section, and label 32,32 has annular cross section) together are fitted in the outlet pipe 42.
Three cylindrical shape carriers 22,32,32 are interlinked together with brazing in the mode identical subsequently and be brazed on the outlet pipe 42, after this catalytic layer is set respectively thereon with example 1.
Just can make the tubulose catalytic converter 12 of reference example 1 according to said procedure, Fig. 3 illustrates its layout, notices that in the drawings outlet pipe 42 is shown in broken lines, in order that make the setting of cylindrical shape carrier 22,32,32 in this example more clear.
Reference example 2
Except using perforated tube to prepare to be located at three the cylindrical shape carriers 22,32,32 in the outlet pipe 43, all the other are all made in the mode identical with reference example 1.
Specifically, in this routine tubulose catalytic converter 13, three the cylindrical shape carriers 23,33,33 that are fixed in the outlet pipe 43 are all made by the porous steel pipe, and one of them cylindrical shape carrier 23 is provided with cross section perpendicular to axial direction, that become letter C shape.
Fig. 4 illustrates the layout of this catalytic converter 13.Notice that outlet pipe 43 is shown in broken lines, in order that make picture more clear in the drawings.
Assessment to the waste-gas cleaning ability
In order to assess according to example 1 and 2, comparative example 1 and 2, and the waste-gas cleaning ability of the tubulose catalytic converter of reference example 1 and 2, respectively this purifier is installed into and accepts the waste-gas cleaning test on the vent systems of a scooter as a means of checking the exhaust conversion ratio, and Fig. 5 illustrates the result of inspection.
Specifically, the waste-gas cleaning test is carried out in the following manner.According to example 1 and 2, comparative example 1 and 2 and respectively this tubulose catalytic converters of reference example 1 and 2 be installed on the vent systems of a scooter.A four stroke engine is housed on this motorcycle, and its discharge capacity is 0.125L (litre) (or 125cc).This motor ties up under the EC-40 pattern and is driven, and the waste gas of discharge is purified by catalytic converter.So just, can check the respectively waste-gas cleaning ability of this catalytic converter.
Can know much higher than according to comparative example 1 and 2 of HC that presents according to the tubulose catalytic converter of example 1 and 2 and CO conversion ratio from Fig. 5.In addition, as can be known, when the cylindrical shape carrier was made with stephanoporate steel plate, above-mentioned conversion ratio also can be high from the comparison of example 1 and example 2.
In addition, comparison with example 1 and reference example 1 and example 2 and reference example 2 can be recognized, according to the way of example 1 and 2, make carrier have a plurality of cylindrical shape carriers or carrier element by predetermined interval be arranged on outlet pipe axially on can obtain higher conversion ratio than reference example 1 and 2.
Comparative example 3
This example is made in the following manner.A metal beehive shape carrier of making by outlet pipe, waveform paper tinsel peace paper tinsel.The outer diameter of outlet pipe is that 42.7mm, length are that 90mm, thickness are 1.2mm, is made of SUS436L steel (pressing JIS).The thickness of waveform paper tinsel peace paper tinsel is 0.1mm, is made of 20Cr-5Al refractory steel.Metal beehive shape carrier has 15.5 cells/cm
2(promptly about 100 cells/side's inch).Metal beehive shape carrier is provided with catalytic layer in the mode identical with example 1.
Assessment to the misfire strength
In order further to assess this catalytic converter, the catalytic converter according to example 2 and comparative example 3 is carried out the test of misfire strength, this test is undertaken by following mode.Relevant catalytic converter is installed on the vent systems of motorcycle.The four stroke engine that it is 0.400L (or 400cc) that this motorcycle is provided with a discharge capacity, this motor is under normal fast condition, promptly under the speed of 60km/l (or the 4th the retaining speed under, or under the rotating speed of 3600rpm) be driven, and after this be forced to stop owing to ignition switch is switched off, the igniting condition of poor so just takes place.In the test of misfire strength, catalytic converter is vouched when motor is forced to stop and stopping always.
After this be removed according to the tubulose catalytic converter of example 2 and comparative example 3 vent systems, and check that with the naked eye they are the influences that how to be subjected to misfire from motorcycle.After this test, the tubulose catalytic converter is photographed.Fig. 6 and 7 illustrate respectively according to the tubulose catalytic converter 11 of example 2 and according to the cellular catalytic converter of comparative example 3 through the outward appearance after the test of misfire strength.
Can confirm to be melted and to damage owing to misfire from Fig. 7 according to the cellular catalytic converter of comparative example 3.On the other hand, as shown in Figure 6, seldom melted and damage by misfire according to the tubulose catalytic converter of example 2.Specifically, in the cellular catalytic converter according to comparative example 3, the thickness of wall paper tinsel of separating each cell is because heat fusing and damage very little so that produced by misfire.And in the tubulose catalytic converter 11 according to example 2, cylindrical shape carrier 21,31,31 is owing to there is enough thickness consequently to be difficult to be melted and damage under the situation of misfire.
Like this, in tubulose catalytic converter according to example 2, owing to big thickness is provided can for cylindrical shape carrier 21,31,31, thereby can present high misfire strength.
As mentioned above, the tubulose catalytic converter according to example 1 and 2 shows high waste-gas cleaning ability.In addition, its advantage is that not only they can make with the expense that reduces, and also has the strength to misfire that strengthens, because the cylindrical shape carrier 20 or 21 that their use has C shape cross section perpendicular to axial direction.
Except above-mentioned tubulose catalytic converter, other embodiment of the present invention is described below again according to example 1 and 2.
Example 3
Carrier 24 comprises the corrosion resistant plate (or carrier element) of three bendings, and they are bent to the cross section that has alphabetical serpentine basically.These crooked corrosion resistant plates are used to substitute cylindrical shape carrier 20,30,30, and are set on the out of phase.Except above-mentioned these, all make in the mode identical with example 1 according to the pipe dress catalytic converter of example 3.
When for example beginning, earlier first corrosion resistant plate cut into required size, bend to the cross section that has alphabetical serpentine basically, on the Vertical direction of S shape, compress, then the end (as left end in figure) of compressed first corrosion resistant plate from 44 two opening ends of outlet pipe is fitted into the middle part in the outlet pipe 44.Second corrosion resistant plate that will be bent to the serpentine cross section subsequently equally is fitted in the outlet pipe 44 from the left end opening, and the serpentine cross section is spent around the rotational 90 of outlet pipe 44 by counter clockwise direction with respect to first block plate.
After this, the 3rd corrosion resistant plate that bends to the serpentine cross section equally is fitted in the outlet pipe 44 from the other end (as right-hand member), the serpentine cross section is spent around the rotational 90 of outlet pipe 44 by counter clockwise direction with respect to first block plate.Note at this moment seeing it is, see it is in the direction of the clock, therefore the serpentine cross section of the 3rd block plate just in time is the reversing of the serpentine cross section of second block plate from the left end opening by counterclockwise from right-end openings.Be also noted that first, second and the 3rd corrosion resistant plate all by predetermined be disposed on outlet pipe 44 axially on.
At last, in the mode identical first, second and the 3rd corrosion resistant plate are brazed on the outlet pipe 44, and are provided with catalytic layer respectively with example 1.
Just can be made into the tubulose catalytic converter 14 of example 3 according to said procedure, it is arranged as shown in Figure 8.Notice that outlet pipe 44 is to be shown in broken lines, in order that make picture clear in the drawings.
Example 4
Carrier 25 comprises the corrosion resistant plate of three bendings, and they are bent to the cross section that has letter " U " shape basically.These crooked corrosion resistant plates are used to three used corrosion resistant plates of carrier in the alternative 3 24.Except above-mentioned these, all make in the mode identical with example 3 according to the tubulose catalytic converter of example 4.
When for example beginning, earlier first corrosion resistant plate cut into required size, bend to the cross section that has letter " U " shape basically, on the substantially horizontal of U-shaped, compress, then the end (as left end in figure) of compressed first corrosion resistant plate from two opening ends of outlet pipe 45 is fitted into the middle part in the outlet pipe 45.Noticing that first corrosion resistant plate is curled at the two ends that its U-shaped cross-section forms opening makes these two ends can not contact the interior perimeter surface of outlet pipe 45.Second block plate that will be bent to " U " shape cross section subsequently equally is fitted in the outlet pipe 45 from the left end opening, and " U " shape cross section is spent around the rotational 90 of outlet pipe 45 by counter clockwise direction with respect to first block plate.After this, the 3rd block plate that will bend to " U " shape cross section equally is fitted in the outlet pipe 45 from the other end (as right-hand member), and " U " shape cross section is spent by counterclockwise rotating 90 with respect to first block plate.Note it at this moment being the counter clockwise direction of seeing from right-end openings.Be also noted that first, second and the 3rd corrosion resistant plate all by predetermined be disposed on outlet pipe 45 axially on.
At last, in the mode identical first, second and the 3rd corrosion resistant plate are brazed on the outlet pipe 45, and are provided with catalytic layer respectively with example 1.
Just can be made into the tubulose catalytic converter 15 of example 4 according to said procedure, it is arranged as shown in Figure 9.Notice that outlet pipe 45 is shown in broken lines, in order that make picture clear in the drawings.
Example 5
Figure 10 illustrates the layout of the tubulose catalytic converter of example 5.Notice that outlet pipe 46 is shown in broken lines, in order that make picture clear in the drawings.
In the tubulose catalytic converter of example 3 to 5, first, second and the 3rd corrosion resistant plate (being carrier element) are set to not on same phase place.Therefore obvious this catalytic converter can have high waste-gas cleaning ability.
The present invention intactly has been described above.But concerning those skilled in the art, inspired by this and obviously can make many variations and modification and do not leave intention and scope defined in the appended claims of the present invention.
Claims (9)
1. catalytic converter that is used for automobile or motorcycle comprises:
An outlet pipe;
A metallic carrier that is located in the outlet pipe, and be made into the shape that at least one is chosen from the cohort that is made of cylindrical shape and waveform; And
Be loaded at least one lip-deep catalytic layer of metallic carrier;
Wherein, metallic carrier have at least two metal carrier members be located at outlet pipe axially on, and two be set to not on same phase place on the peripheral direction of adjacent metal carrier element at outlet pipe on axially at outlet pipe.
2. catalytic converter as claimed in claim 1 is characterized in that described carrier has three or more carrier elements, and on the peripheral direction of outlet pipe, they are set to mutually not on same phase place.
3. catalytic converter as claimed in claim 1 is characterized in that described carrier element is made by corrugated sheet, and its cross section is formed at least one shape of choosing from the cohort that is made of alphabetical serpentine and letter " U " shape.
4. catalytic converter as claimed in claim 1 is characterized in that, described carrier is that the corrugated sheet of alphabetical serpentine is made by the polylith cross section.
5. catalytic converter as claimed in claim 1, it is characterized in that, each described carrier all becomes the assembly parts of carrier element, comprise a plurality of cylindrical shape carrier elements, and in each carrier element assembly parts at least two outlet pipe axially on adjacent cylindrical shape carrier element contact with each other with its outer surface.
6. catalytic converter as claimed in claim 5, it is characterized in that, in each described carrier element assembly parts, has a cylindrical shape carrier element at least, the cross section that has otch with an annular, and be set in the outlet pipe with the state of resiliently deformable, it can be expanded on centrifugal direction.
7. catalytic converter as claimed in claim 1 is characterized in that described carrier element is made into cylindrical shape, contacts with each other with its outer surface, and is interlinked on the outer surface of contact.
8. catalytic converter as claimed in claim 1 is characterized in that, described carrier element contacts and is attached on it with the interior perimeter surface of outlet pipe.
9. catalytic converter as claimed in claim 1 is characterized in that described carrier element is made by the stephanoporate steel plate with a plurality of penetration holes.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP335424/2002 | 2002-11-19 | ||
| JP2002335424A JP4278964B2 (en) | 2002-11-19 | 2002-11-19 | Exhaust gas purification device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1502792A CN1502792A (en) | 2004-06-09 |
| CN1272533C true CN1272533C (en) | 2006-08-30 |
Family
ID=32290342
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2003101043542A Expired - Fee Related CN1272533C (en) | 2002-11-19 | 2003-10-24 | Exhaust-gas purifying apparatus |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US7387766B2 (en) |
| JP (1) | JP4278964B2 (en) |
| CN (1) | CN1272533C (en) |
| TW (1) | TWI257323B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4835989B2 (en) * | 2006-08-08 | 2011-12-14 | トヨタ自動車株式会社 | Catalyst deterioration detection device for internal combustion engine |
| JP5279284B2 (en) * | 2008-01-30 | 2013-09-04 | 株式会社キャタラー | Punching metal carrier catalyst for exhaust gas purification |
| CN108331648B (en) * | 2018-01-23 | 2020-05-12 | 倪惠芳 | Dedicated aircraft tail gas cleanup unit of aerospace |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4203502A (en) * | 1978-08-28 | 1980-05-20 | Strader Walter F | Muffler |
| US4402662A (en) * | 1980-05-13 | 1983-09-06 | Government Of The United States As Represented By The Environmental Protection Agency | Thermal shock resistant split-cylinder structures |
| JP3610406B2 (en) | 1996-02-21 | 2005-01-12 | ヤマハ発動機株式会社 | Catalytic converter |
| JPH09317452A (en) | 1996-05-24 | 1997-12-09 | Honda Motor Co Ltd | Exhaust gas purifying device |
-
2002
- 2002-11-19 JP JP2002335424A patent/JP4278964B2/en not_active Expired - Fee Related
-
2003
- 2003-09-08 US US10/656,178 patent/US7387766B2/en not_active Expired - Fee Related
- 2003-09-09 TW TW092124911A patent/TWI257323B/en not_active IP Right Cessation
- 2003-10-24 CN CNB2003101043542A patent/CN1272533C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| US7387766B2 (en) | 2008-06-17 |
| TW200408448A (en) | 2004-06-01 |
| TWI257323B (en) | 2006-07-01 |
| US20040096374A1 (en) | 2004-05-20 |
| CN1502792A (en) | 2004-06-09 |
| JP4278964B2 (en) | 2009-06-17 |
| JP2004169601A (en) | 2004-06-17 |
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